My wife and I tend to watch TV shows a year after they come out; we rent the DVDs from Netflix and watch them then. We’re right now working our way through the third seasons of Heroes. If you’ve watched even the first season of Heroes, you know that Eclipses are a Big Deal and somehow cause or affect superpowers in humans. Well, there’s another total solar eclipse coming in Season 3. Here’s a screenshot (also showing a vapor ring left behind as Nathan Patrelli took off flying at high speed) of the moon about to eclipse the Sun:
OK, first, the good. Yes, the Moon is apparently about the same size as the Sun in the sky. (Yeah, the Sun looks a little bigger, but that’s probably because of the glare. There’s about to be a total eclipse, so they’ve got to have about the same apparent size. In any event, the size is close.)
Now, the bad. When the moon is that close to the Sun in the sky, it is a tiny, tiny, tiny, very thin crescent, basically a new moon. You will not see it at all, until it starts to actively block out the Sun. The reason for this is that since they’re so close to each other in a sky, it’s almost a straight line from the Earth to the Moon to the Sun. The distance to the Moon is much less, so the Moon is between us and the Sun. Thus, the side lit up by the Sun is the far side of the Moon from us.
Yet, here, instead of an almost-new moon, we see an almost-half-full moon! For half of the moon to be lit by the Sun when we see the two right next to each other in the sky, the moon would have to be at about the same distance from us as the Sun…. Well, it’s not quite half, so it’s a little closer, but we’re talking inside the orbit of Mercury here. And, for the Moon to look as big as as the Sun when it’s that far away, it will have to be physically almost as big as the Sun!
In our Universe, the Moon is a satellite of the Earth, about 1/4 the diameter of the Earth, and orbiting the Earth. The Sun is about 100 times the diameter of the Earth. The reason they look about the same size in the sky is because the Moon is so much closer.
From the evidence in the image above, however, the Earth of the Heroes Universe is very, very strange. They orbit a binary “star” system, including the Sun and the Moon… although the Moon is not a satellite of the Earth at all, but a binary partner to the Sun. However, the Heroes Universe Moon is an extremely bizarre object, for despite being so large, it does not shed any light of its own in the optical. It’s clearly not a large gas cloud, for you can see by looking at it that it’s a solid object with “seas” and craters and all of that. So, it’s something that has somehow managed to be as big as the Sun without triggering fusion inside to make it glow.
Well, given that all these superpowers work, we already knew they were operating under different laws of Physics, so I guess we shouldn’t be surprised.
My only fear is that people watching the show don’t realize that the producers are being very clever here in showing us that the Moon is a gigantic object that is nearly as far away as the Sun, very different from the case in our own world. I fear that some people watching might either think that the producers of the show have done the typical Hollywood thing and made a boner of a mistake, or may think that it’s entirely reasonable to see a near-half Moon right next to the Sun in the sky. I hope in upcoming episodes there will be dialog between the characters that more clearly reveals the nature of their Moon as a star-sized object close to the Sun.